Mr Selamat's son has come under scrutiny from investigators because of his job as an aviation mechanic. Officials have been prising open the backgrounds of all who boarded the Boeing 777, trying to unlock the riddle over its disappearance.
They have reportedly found nobody with flying experience but looked hard at Mr Selamat's son because of his experience with aircraft. "The focus is on anyone else who might have had aviation skills on that plane," a senior police official said.
At the Everly Hotel in Putrajaya, near Kuala Lumpur, Mr Selamat said police had not questioned him about his son, but the family was happy to help if needed.
As a boy, his son had enjoyed sport, especially football, and he supported both Liverpool and Manchester United, he said. But his son had always wanted to be an an engineer and Mr Selamat had taken out a loan for his education. He said his son was married and had a 15-month-old son, Hizat.
For the past three years his son had been working for the Malaysian branch of the Swiss-based ExecuJet Aviation Group, which sells and charters aircraft.
"The other family members are not willing to face the media," he said. "For me, if I'm not talking to the media, nobody will know how I am feeling."